Scrub the tongue with rock salt then rinse. Place the ox tongue in a potand put water enough to cover the tongue. Set on high pressure for 40 minutes.
Release the pressure and dispose the liquid. Remove the tongue and carefully peel off the skin. cut into cubes then set aside.
Set in saute mode, Saute the onions, garlic, aby leaves, leeks, carrots, mushrooms and bell pepper.
Add the tomato paste, sauce, broth, salt and pepper. Set to low pressure until the sauce thickens.
Add the cubed ox tongue to the sauce mixture and serve.